A boy is running on the plane road with velocity $v$ with a long hollow tube in his hand. The water is failing vertically downwards with velocity $u$. At what angle to the vertical, he must incline the tube so that the water drops enter it without touching its sides?
A boy is running on the plane road with velocity $v$ with a long hollow tube in his hand. The water is failing vertically downwards with velocity $u$. At what angle to the vertical, he must incline the tube so that the water drops enter it without touching its sides?
- A
$\tan ^{-1}\left(\frac{v}{u}\right)$
- B
$\sin ^{-1}\left(\frac{v}{u}\right)$
- C
$\tan ^{-1}\left(\frac{u}{v}\right)$
- D
$\cos ^{-1}\left(\frac{v}{u}\right)$
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